300字范文 > Android开发本地及网络Mp3音乐播放器(十二)创建NetMusicListAdapter SearchResult显示网络音乐列表

Android开发本地及网络Mp3音乐播放器(十二)创建NetMusicListAdapter SearchResult显示网络音乐列表

时间：2019-01-10 23:28:10

转载请注明出处：/iwanghang/article/details/51290181

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实现功能：

实现NetMusicListAdapter（网络音乐列表适配器）

实现SearchResult（搜索音乐对象）

使用Jsoup组件请求网络,并解析音乐数据，并，音乐数据加载到列表中

实现FooterView

截止到目前的源码下载：

/detail/iwanghang/9747505[免积分]

/detail/iwanghang/9507635[1积分]

Jsoup组件导入：

AndroidStudio简单快速导入GitHub中的第三方组件：

/iwanghang/article/details/51283763

Jsoup简介及中文API：

/iwanghang/article/details/51282403

/iwanghang/article/details/51283638

/iwanghang/article/details/51283659

实现效果如图：

FooterView:

实现代码如下：

NetMusicListFragment如下：

package com.iwanghang.drmplayer;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.os.AsyncTask;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.text.TextUtils;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.EditText;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import com.iwanghang.drmplayer.adapter.MyMusicListAdapter;import com.iwanghang.MusicListAdapter;import com.iwanghang.drmplayer.utils.AppUtils;import com.iwanghang.drmplayer.utils.Constant;import com.iwanghang.drmplayer.utils.SearchMusicUtils;import com.iwanghang.drmplayer.vo.Mp3Info;import com.iwanghang.drmplayer.vo.SearchResult;import org.jsoup.Jsoup;import org.jsoup.nodes.Document;import org.jsoup.select.Elements;import java.io.IOException;import java.util.ArrayList;public class NetMusicListFragment extends Fragment implements OnItemClickListener,OnClickListener {private ListView listView_net_music;//private ArrayList<Mp3Info> mp3Infos;private LinearLayout load_layout;private LinearLayout ll_search_btn_container;private LinearLayout ll_search_container;private ImageButton ib_search_btn;private EditText et_search_content;private NetMusicListAdapter netMusicListAdapter;//存放网络音乐的集合private ArrayList<SearchResult> searchResults = new ArrayList<SearchResult>();private int page = 1;//搜索音乐的页码private MainActivity mainActivity;//private boolean isPause = false;//歌曲播放中的暂停状态private int position = 0;//当前播放的位置,提供给PlayActivity//onAttach(),当fragment被绑定到activity时被调用(Activity会被传入.).@Overridepublic void onAttach(Context context) {super.onAttach(context);//mainActivity = (MainActivity) context;mainActivity = (MainActivity) getActivity();}public static NetMusicListFragment newInstance() {NetMusicListFragment net = new NetMusicListFragment();return net;}@Nullable@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {//UI组件初始化View view = inflater.inflate(_music_list_layout,null);//itemlistView_net_music = (ListView) view.findViewById(R.id.listView_net_music);//findViewByIdload_layout = (LinearLayout) view.findViewById(R.id.load_layout);ll_search_btn_container = (LinearLayout) view.findViewById(R.id.ll_search_btn_container);ll_search_container = (LinearLayout) view.findViewById(R.id.ll_search_container);ib_search_btn = (ImageButton) view.findViewById(R.id.ib_search_btn);et_search_content = (EditText) view.findViewById(R.id.et_search_content);//Item点击事件监听listView_net_music.setOnItemClickListener(this);//按钮点击事件监听ll_search_btn_container.setOnClickListener(this);ib_search_btn.setOnClickListener(this);loadNetData();//加载网络音乐return view;}private void loadNetData() {load_layout.setVisibility(View.VISIBLE);//加载网络音乐的异步任务new LoadNetDataTask().execute(Constant.BAIDU_URL + Constant.BAIDU_DAYHOT);}@Overridepublic void onClick(View v) {switch (v.getId()){case R.id.ll_search_btn_container:ll_search_btn_container.setVisibility(View.GONE);ll_search_container.setVisibility(View.VISIBLE);break;case R.id.ib_search_btn://搜索事件searchMusic();break;}}//搜索音乐private void searchMusic() {//隐藏键盘AppUtils.hideInputMethod(et_search_content);ll_search_btn_container.setVisibility(View.VISIBLE);ll_search_container.setVisibility(View.GONE);//获取输入的文字String key = et_search_content.getText().toString();if (TextUtils.isEmpty(key)){//如果为空,则,Toast提示Toast.makeText(mainActivity,"请输入歌手或歌词",Toast.LENGTH_SHORT).show();return;}load_layout.setVisibility(View.VISIBLE);//加载layout效果.显示//填充item 使用SearchMusicUtils搜索音乐工具类,并,使用观察者设计模式,自己回调,自己监听//SearchMusicUtils.}//加载网络音乐的异步任务//Android1.5提供了工具类 android.os.AsyncTask，它使创建异步任务变得更加简单，不再需要编写任务线程和Handler实例即可完成相同的任务。class LoadNetDataTask extends AsyncTask<String,Integer,Integer>{//onPreExecute方法用于在执行后台任务前做一些UI操作@Overrideprotected void onPreExecute() {super.onPreExecute();load_layout.setVisibility(View.VISIBLE);//加载layout.显示listView_net_music.setVisibility(View.GONE);//item.隐藏searchResults.clear();//搜索结果.清理}//doInBackground方法内部执行后台任务,不可在此方法内修改UI@Overrideprotected Integer doInBackground(String... params) {String url = params[0];try {//使用Jsoup组件请求网络,并解析音乐数据Document doc = Jsoup.connect(url).userAgent(Constant.USER_AGENT).timeout(6*1000).get();//<a href="/song/121353608" target="_blank" title="刘珂矣半壶纱" data-film="null">半壶纱</a>//<a hidefocus="true" href="/artist/132632388">刘珂矣</a> //<a href="/song/264506450" target="_blank" title="韩磊千年一般若" data-film="null">千年一般若</a><div class="extra-info">影视原声</div>//<a hidefocus="true" href="/artist/1302">韩磊</a> //从doc分析以上html代码;把所有span标签下song-title查找出来,存在songTitles集合中;即,歌名集合;//从doc分析以上html代码;把所有span标签下author_list查找出来,存在artists集合中;即,歌手集合;Elements songTitles = doc.select("span.song-title");Elements artists = doc.select("span.author_list");//System.out.println(artists);for (int i=0;i<songTitles.size();i++){SearchResult searchResult = new SearchResult();//System.out.println("@searchResult : " + searchResult);//<a href="/song/121353608"//<a href="/song/264506450"//a链接,存在urls集合中;即,歌曲url集合;//a链接,第一个a连接,href属性的值;即,最终的url;//a链接,第一个a连接,text(a链接的内容,例:>半壶纱<,半壶纱就是a链接的内容);即,最终的歌名;Elements urls = songTitles.get(i).getElementsByTag("a");//System.out.println("@urls : " + urls);searchResult.setUrl(urls.get(0).attr("href"));//设置最终的urlsearchResult.setMusicName(urls.get(0).text());//设置最终的歌名//a链接,存在urls集合中;即,歌曲url集合;Elements artistElements = artists.get(i).getElementsByTag("a");//System.out.println("@artistElements : " + artistElements);searchResult.setArtist(artistElements.get(0).text());//设置最终的歌手searchResult.setAlbum("热歌榜");//设置最终的专辑System.out.println("@searchResult : " + searchResult);searchResults.add(searchResult);//把最终的所有信息,添加到集合}System.out.println("@searchResults : " + searchResults);//System.out.println("@songTitles.size() : " + searchResults.size());} catch (IOException e) {e.printStackTrace();return -1;}return 1;}//onPostExecute方法用于在执行完后台任务后更新UI,显示结果@Overrideprotected void onPostExecute(Integer result) {super.onPostExecute(result);if (result==1){netMusicListAdapter = new NetMusicListAdapter(mainActivity,searchResults);//System.out.println(searchResults);listView_net_music.setAdapter(netMusicListAdapter);listView_net_music.addFooterView(LayoutInflater.from(mainActivity).inflate(R.layout.footviwe_layout,null));}load_layout.setVisibility(View.GONE);listView_net_music.setVisibility(View.VISIBLE);}}@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {}}

NetMusicListAdapter如下：

package com.iwanghang.drmplayer.adapter;import android.content.Context;import android.graphics.Bitmap;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import com.iwanghang.drmplayer.R;import com.iwanghang.drmplayer.utils.MediaUtils;import com.iwanghang.drmplayer.vo.Mp3Info;import com.iwanghang.drmplayer.vo.SearchResult;import java.util.ArrayList;/*** 自定义的音乐列表适配器(网络)* 为了方便扩展，因为之前没有考虑到显示专辑封面* Created by iwanghang on 30/4/16.*/public class NetMusicListAdapter extends BaseAdapter{private Context ctx; //上下文对象引用private ArrayList<SearchResult> searchResults;//存放SearchResult引用的集合private SearchResult searchResult;//SearchResult对象引用//private int pos = -1;//列表位置/*** 构造函数* @param ctx 上下文* @param searchResults 集合对象*/public NetMusicListAdapter(Context ctx, ArrayList<SearchResult> searchResults){this.ctx = ctx;this.searchResults = searchResults;//System.out.println("MyMusicListAdapter.java #0 : ctx = " + ctx + ",mp3Infos = " + mp3Infos.size());}public ArrayList<SearchResult> searchResults() {System.out.println("NetMusicListAdapter.java #1 : public ArrayList<SearchResult> searchResults() {");return searchResults;}public void setSearchResults(ArrayList<SearchResult> searchResults) {System.out.println("NetMusicListAdapter.java #2 : public void setMp3Infos(ArrayList<SearchResult> searchResults) {");this.searchResults = searchResults;}@Overridepublic int getCount() {//System.out.println("NetMusicListAdapter.java #3 : public int getCount() {" + mp3Infos.size());//return mp3Infos.size();return searchResults.size();}@Overridepublic Object getItem(int position) {System.out.println("NetMusicListAdapter.java #4 : public Object getItem(int position) {");return searchResults.get(position);}@Overridepublic long getItemId(int position) {//System.out.println("NetMusicListAdapter.java #5 : public long getItemId(int position) {");return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {//System.out.println("NetMusicListAdapter.java #6 : public View getView ");ViewHolder vh;if(convertView==null){//vh = new ViewHolder();convertView = LayoutInflater.from(ctx).inflate(R.layout.item_net_music_list,null);vh = new ViewHolder();vh.textView1_title = (TextView) convertView.findViewById(R.id.textView1_title);vh.textView2_singer = (TextView) convertView.findViewById(R.id.textView2_singer);//vh.textView3_time = (TextView) convertView.findViewById(R.id.textView3_time);//vh.imageView1_ablum = (ImageView) convertView.findViewById(R.id.imageView1_ablum);//System.out.println("NetMusicListAdapter.java #7 : textView1_title = " + vh.textView1_title);convertView.setTag(vh);//表示给View添加一个格外的数据，}else {vh = (ViewHolder)convertView.getTag();//通过getTag的方法将数据取出来}SearchResult searchResult = searchResults.get(position);vh.textView1_title.setText(searchResult.getMusicName());//显示标题vh.textView2_singer.setText(searchResult.getArtist());//显示歌手//vh.textView3_time.setText(MediaUtils.formatTime(mp3Info.getDuration()));//显示时长//获取专辑封面图片//Bitmap albumBitmapItem = MediaUtils.getArtwork(ctx,mp3Info.getId(),mp3Info.getAlbumId(),true,true);//System.out.println("NetMusicListAdapter.java #8 : albumBitmapItem = " + albumBitmapItem.getConfig());//改变播放界面专辑封面图片//vh.imageView1_ablum.setImageBitmap(albumBitmapItem);//vh.imageView1_ablum.setImageResource(R.mipmap.music);return convertView;}/*** 定义一个内部类* 声明相应的控件引用*/static class ViewHolder{//所有控件对象引用TextView textView1_title;//标题TextView textView2_singer;//歌手//TextView textView3_time;//时长//ImageView imageView1_ablum;//专辑封面图片}}

SearchResult如下：

package com.iwanghang.drmplayer.vo;/*** Created by iwanghang on 16/4/29.* 搜索音乐的对象*/public class SearchResult {private String musicName;private String url;private String artist;private String album;private long size;//大小//set方法,get方法public String getMusicName() {return musicName;}public void setMusicName(String musicName) {this.musicName = musicName;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public String getArtist() {return artist;}public void setArtist(String artist) {this.artist = artist;}public String getAlbum() {return album;}public void setAlbum(String album) {this.album = album;}public long getSize() {return size;}public void setSize(long size) {this.size = size;}@Overridepublic String toString() {return "SearchResult{" +"musicName='" + musicName + '\'' +", url='" + url + '\'' +", artist='" + artist + '\'' +", album='" + album + '\'' +", size=" + size +'}';}}

footview_layout.xml如下：

<?xml version="1.0" encoding="utf-8"?><TextView android:id="@+id/textView4"xmlns:android="/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical"android:padding="10dp"android:gravity="center"android:textSize="10sp"android:textColor="#a6a8a8"android:text="已经到最后了"></TextView>

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转载请注明出处：/iwanghang/article/details/51290181

项目源码(打赏1积分请点这边)：/detail/iwanghang/9507635

项目源码(免积分下载请点这边)：/detail/iwanghang/9747505

Android开发本地及网络Mp3音乐播放器系列博文汇总：

Android开发本地及网络Mp3音乐播放器(一)前言

Android开发本地及网络Mp3音乐播放器(二)SplashActivity(欢迎界面)